Riveting-machine.



w H. 0. NORRIS.

RIVETING MACHINE.

.uwucmou FILED uov.19. 1915.

Patented May 15, 1917..

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RIVETING MACHINE. APPLICATION mm NOV; 19. 19:5.-

1,225,9.95. Patented May15,1917.

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RIVETING-MACHINE.

Specification of Letters Patent.

Patent-ea May 15, Torr.

Application filed November 19, 1915. Serial No. 62,277.

To all whom it may concern:

Be it known that I, HENRY Q. Norms, a citizen of the United States, residing at Celeste, in the county of Hunt and State of Texas, have invented certain new and use ful Improvements in Riveting-Machines, of which the following is a specification.

This invention pertains to new and useful improvements in riveting machines.

The object of the invention is to provide a superior machine of simple construction particularly adapted to the cutting and clenching of small rivets or escutcheon pins and including certain features constituting a marked advance in this art.

Another object is to provide a machine including a movable anvil for receiving a rivet and cooperating with a clenching hammer, together with a pair of cutters mounted to swing into the shank of the rivet whereby the surplus is cut off and the remainder more readily clenched or upset by the hammer.

Another object is to provide a machine of the character described that will be strong, durable and efficient, comparatively simple in construction, also one in which the several parts will not be likely to get out of working order.

vW'ith the above and other objects in view the invention has relation to certain novel features of construction and operation, an example of which is described in the following specification and illustrated in the accompanying drawings, wherein:

Figure 1 is a side elevation of the machine,

\ Fig. 2 is a front elevation,

Fig. 3 is a plan view, 7

Fig. 4 is a detail of the anvil and hammer parts, partially in section, and

Fig. 5 is a transverse vertical sectional view taken on the line (we of Fig. 1.

In the drawings the numeral 1 designates a base plate on which standards 2, 3 and 4 respectively, are disposed longitudinally and alined transversely so as to support in common, a transverse shaft 5. .The base plate may be mounted on any suitable support at the proper height. A tripping wheel 6 is keyed on the shaft 5 between the standards 2 and 3 as shown in Fig. 5; while a ratchet wheel 7 also keyed on said shaft is disposed against the standard 3 and between the latter and the standard 4:. An operating lever 8 has its upper end pivoted on the shaft 5 between the ratchet wheel and the standard 4 and depends through a slot 9 in the base plate. Immediately below the base, plate the lever is off-set at 10 and has suitable connection with an operating element (not shown). 7 p

The standards 2 and 8 are mergedinto a support 11 which is recessed at 12 whereby an anvil block 13 is formed at the front of the machine below the recess, and a hammer sleeve is is provided over the block and depending slightly into the recess as is best shown in Figs. 2 and 4. In the block a cylindrical plunger-anvil 15 is mounted to slide vertically. The upper end of the anvil is reduced and dished and normally projects slightly above the block. For elevating the anvil a horizontal sliding bar 16 is mounted in ahousing .18 under the plate 1. This bar carries a wedge or inclined boss 17 which is adapted to ride under the anvil and elevate the same. The bar is moved rearward duringthisoperation by a pair of coil springs 19 having their rear ends attached to the portion 10 of the lever 8. The rear. portion of the bar slides through a keeper 20 and has a nose 21 at its rear extremity which abuts the lever portion 10. When the lever 8 is swung rearward the bar 16 is likewise moved until arrested, the springs 19 permitting a continued swing of the said lever and the contact of the lever and the nose returning the bar to its normal position.-

A pawl22 is pivoted on the lever 8 so as to engage the ratchet wheel 7, being held in contact therewith by a coil spring 23 extending from the forward end of the pawl to the nose of the bar 16. As the lever is swung rearward rotation is imparted to the ratchet wheel and also the shaft 5 on which, the wheel 6 is keyed. A pair of cars 24 project upward from the top of the support 11 and a hammer arm 25 is centrally pivoted between said ears. On the periphery of the wheel 6 cam pieces or bosses 26 are disposed at intervals. The rear end of the arm 25 is provided with a roller 27 which rides on the periphery of the wheel 6 and when encountered by one of the pieces 26 rides over the same, whereby the arm is rocked.

The forward end of the arm is shaped to ride on the upper end of a Vertical hammer 28 mounted to slide in the sleeve 14. The upper end of the hammer is shouldered so as to confine a coiled spring 29 resting on the sleeve and encircling the hammer. A set screw 30 threaded in the upper end of the hammer is engaged by the arm and the adjustment of this screw controls the pro ection of the hammer below the sleeve and its normal distance from the anvil over which it is disposed. By adjusting this screw the distance traveled by the hammer before contacting with the anvil may be varied. The hammer is shaped to perform the clenching or upsetting operation in conjunction with the anvil.

Before the hammer does its work the rivet must be cut off and for this purpose a pair of nipper-jaws are provided. These jaws comprise a pair of arms 31 having their lower ends bifurcated and straddling the sleeve 14 on which they are joined and pivoted by cap-screws 32. The arms are disposed on each side of the sleeve so as to swing transversely of the machine. Opposite their pivot points the arms 31 have sockets 33 in which cutters or chisels 34 are inserted. These cutters are heldin the sockets by cap-screws 35 and are directed toward each other, each cutter being disposed at an angle of about thirty degrees to the perpendicular, although this may be varied. The cutters may be adjusted and are brought closer together when lowered.

The arms project vertically some distance above their pivot points and when swung have sufiicient leverage to exert considerable pressure on the work through the cutters. As shown in Fig. 1 the upper ends of the arms are curved rearward and connected by a coil spring 36 over the support 11. An ear 38 projecting from each side of the support pivotally support links 39. Each link is pivoted at its center and has its forward I end bearing against an adjusting screw 37 projecting laterally from the adjacent arm 31. The spring 36 tends to swing the arms 31 together, while the screws 37 hold them apart. The rear ends of the links project betweenand engage the forward ends of a pair of tripping levers 40.

The levers 10 are pivoted intermediate their ends in cars 4:1 provided on the support over the standards 2 and 3. Each lever 10 has a roller 12 mounted at its rear end over the shaft 5 and bearing on the side of the wheel 6 in the path of a plurality of regularly spaced tripping lugs 13 fastened on the wheel. When one of the lugs strikes a lever the latter is swung. The lugs are arranged on both sides of the wheel and exactly opposite each other so as to swing the levers simultaneously. When the rear ends of the lever are swung outward their forward ends are swung inward and bearing on the rear ends of the links 39 thus swin the forward ends of the latter outwar Through the agency of the screws 37 the upper ends of the arms 31 are swung outward whereby the cutters 34 are swung 1nward.

It is quite apparent from the drawings and foregoing description that there are three distinct movements in the operation of this machine. The ZLIIVllTPlHIIgE/I is moved by the bar 16; the hammer by the hammer arm 25; and the cutters by the tripping levers 40; all of which is effected by the swinging of the operating lever 8 and the revolution of the wheel 6. The parts are so arranged and timed that the anvil-plunger will be moving upward before the cutting operation, whereby the rivets will be sheared off before clenching.

In operating the machine, the rivet having been inserted in the work, the latter is placed in the machine so that the head of the rivet rests on the anvil-plunger 15 with the end projecting upward into the path of the cutters 34:. The lever 8 is now swung by suitable means either mechanically or manually. As the lever is swung rearward the bar 16 is pulled rearward so that the wedge 17 rides under the plunger 15 thus elevating the same and at the same time rotation is imparted to the wheel 6 through the agency of the pawl 22, ratchet wheel 7 and shaft 5. During the upward movement of the plunger 15 a pair of lugs 43 will ride under the rollers 42 and swing the levers 40 whereby the arms 31 will be swung and the cutters 3-1 forced against the rivet which is being carried upward by the plunger with the result that the end of the rivet is sheared ed. The lugs riding from the rollers 42 permit the spring 36 to return the cutter parts to their normal positions. The rearward swing of the lever 8 is continued and one of the cam pieces 26 is brought under the roller 27 whereby the hammer arm 25 is rocked; however previous to this the bar 16 has reached the limit of its rearward movement so that the anvil-plunger 15 rests on the upper fiat surface of the wedge boss 17 and is solidly supported so as to sustain the impact from the hammer 28. When the hammer arm is rocked its forward end depresses the hammer 28 which impinges the sheared end of the rivet and clenches the same. At this point the lever 8 is released whichpermits the parts to come to rest in the positions shown in Fig. 1.

What I claim is:

1. In a riveting machine, a'reciprocatory hammer and a movable anvil, a cutting de vice, a means for periodically reciprocating the anvil toward or away from the hammer while said hammer is at rest and a means for operating the cutting device after the movement of the anvil toward the hammer and prior to the reciprocation of the hamthe hammer, a means for periodically moving mer, in combination with a revoluble tripping wheel having peripheral offsets arranged to control the operating means for both anvil and hammer and side offsets arranged to control the operating means for the cutting device.

2. In a riveting machine, the combination with an anvil, a reciprocating hammer, and a cutting device, of means for operating the hammer, means for operating the cutting device, and a revolving operating element having provision for operating the hammer op erating means and also the cutting device operating means, the cutting device being operated previous to the hammer.

3. In a riveting machine, the combination with a base, of an anvil mounted thereon, a hammer supported over the anvil, a hammer operating arm, a cutting device having cutters disposed relatively between the anvil and hammer, tripping levers for operating the cutting device, a tripping wheel having provision for rocking the hammer and arm and also means for operating the tripping levers.

4. In a riveting machine, the combination with a base, of an anvil mounted on the base, a hammer supported over the anvil, means for elevating the anvil, a hammer operating arm, a cutting device having cutters disposed relatively between the anvil and the hammer, an operating device for the cutting device, a tripping wheel having provision for rocking the hammer arm and also means for operating the cutting device, and an operating element having connection with the anvil elevating means and provision for imparting rotation to the tripping wheel.

In testimony whereof I have signed my name to this specification.

HENRY O. NORRIS.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. G. 

